Ring-expander for piston-heads.



No. 892,287. PATENTED JUNE 30, 1908. J. G. MORSE.

RING EXPANDER FORPISTON HEADS.

APPLICATION FILED SEPT. 6. 1907.

2 SHEETS-SHEET 1.

Witnesses MOI/'153 www 2925.3 l 1 a attenta# N0.s92,27. PATBNTED JUNEso, 190s.

J. c. MORSE.

RING EXPANDBR FOR PISTON HEADS.I

APPLICATION FILED sEPT.s.1901.

2 SHEETS-SHEET 2.

JOHN (1. NURSE, O1" NORTH BALTIMORE, OHlO.

RING-EXANDER FOR PISTON-HE ADS.

Specification of Letters Patent.

Patented June 30, 1908.

Application ied September 6,1907. Serial No. 391,744.

r1 'o all whom it may concern:

Be it known that l, .lonav C. Mouse, a citizen of the United States,residing at North i-altimore, in the county of Wood andtate oi' Ohio,have invented certain new and useful Improvements in ling-lilxpandersfor Piston-ileads, and l. do hereby declare the following to be a l'ull,clear, and exact description oll the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to improvements in ring expanders [or pistonheads, and can be applied in various ways where pistons are employed.

it further relates to the novel means for expanding piston rings throughthe mediuln oil a traveling disk which is larger in diameter than oneend of the device, e(msequently forming a conical approach for saiddisk. By this means the ribs are forced outwardly and at the same timeexpand the piston rings. This expansion is not limited as the pistonrings can be expanded to any required diameter consistent with thestrength of the material of which the piston rings are coinposed.

in the accompanying drawing Figure 1 represents an elevation of the improved ring expander. Fig. 2 is a central longitudinal section ol' thedevice. liig. 5% is an elevation ol the device, exhibiting a portion ofa )iston and one piston ring, and Fig. 4 is an end view ofthe device.

rlhis device relates to a number of ribs 1 which are symmetricallyarranged around an annular plate 2, and which are secured thereto bysuitable. screws or bolts 3. 'lhe face of said annular plate 2 isslightly conical or tapering so as to aceommmlate itsell" to the conicalcontourI that said ribs .l would assume when expanded by the travelingdisk 4.

The annular plate 2 is ol' considerable thickness so as to allow ol ascrew thread 5 therein for accommodating a gage screw 6. This gage screw(i is provided with a hand wheel 7 so as to i'orce said gage screwinwardly or outwardly. Said gage screw (5 is designed to regulate themovement of the screw 8, so as to permit the point .1 to center in theend of the piston heads thus preventing slipping of the device whendnoperation. The screw S engages screw threads in said disk 4 whereby thepiston rings can be expanded according to the size of the piston head10. At the operating end of said screw S, is a crank 11- or any othersuitable device can be enipioyed for rotating the screw 8. A portion et'theinetal forming the body orstoek ol' said screw S is reduced in itsdiameter, as ndicated at 12, so as to pass through the gage screw (Landthrough the medium of its crank 1l and disk 4, the ribs 1 can be ex-Lpanded to any extent, desired for various sizes of piston heads.

The ribs 1 are recessed longitudinally at 14 so as to accommodateextension tongues 15. Said tongues are slotted at 16 almost their entirelength and are provided with retaining screws -17 so that they can beadjusted on said ribs 1 for the purpose of slipping the first ring overthe grooves in back end of the )iston head, and may bc raised or loweredby loosening screws 17 in slots 16.

When operating the device the extension tongues 15 are projected asuitable distance beyond the ribs 1, according to the number of pistonrings that are intended to be placed upon a piston head, after which thepiston rings are put upon said ribs and their accompanying extensiontongues 15. In doing this care mustbe taken that the piston rings do notproject beyond the ends of the ribs 1, until such time when the pistonrings are all expanded through the medium of the mechanism previousldescribed. Then the tongues 15 are force( over the piston head, asindicated in Fig. 3, and the piston rings being expanded spring intotheir annular re cesses formed in said head.

I claim:

1. A ring expander which is provided with l an annular plate, ribssecured to said plate, extension tongues-mounted on said rlbs incombination with means for expanding said ribs and extension tongues.

2. A ring expander which is provided with an annular plate, ribs securedto said plate, extension tongues mounted in, recesses in said ribs incombination with means for cxpanding said ribs and extension tongues.

3. A ring expander consisting of an annular plate, ribs which areprovided with extension tongues secured to said annularl plate, a diskfor expanding said ribs and extension tongues and a screw device foractuating said disk, and means for adjusting said screw device.

4. A ring expander consisting of an' annular plate, ribs provided withextension tongues and secured to said plate, a disk for expanding saidribs 'and tongues, and e pointed screw for actuating said disk.

5, A ring expander consisting of an annular plate, ribs secured to seidplete, e disk for expanding seid ribs, an actuating screw for said diskhaving screw connection therewith, an adjusting screw for seid actuatingscrew engaging with saidl annuler plate and having e longitudinalpassage therethrough, the shank of said actuating screw extendingthrough said tissage, and ineens on the end of seid shen i for turningseid actuating screw.

'1er plate, ribs provided with extension tongues and secured to saidplate, a. disk for expanding said ribs and tongues, a screw foractuating seid disk and an adjusting screw for seid actuating screwengaging with seid 20 I annular plate and through which the shank ofseid actuating screw is passed. l

In testimony whereof, I eiiix my signature, in presence of tWoWitnesses.

. JOHN C. MORSE. /Vitnesses C. WAY, E. C. MOORE.

6, A ring expander consisting of an ennu- 15

